CN86103008B - Medium carbon air-cooled mn/b bainitic steel - Google Patents
Medium carbon air-cooled mn/b bainitic steel Download PDFInfo
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- CN86103008B CN86103008B CN86103008A CN86103008A CN86103008B CN 86103008 B CN86103008 B CN 86103008B CN 86103008 A CN86103008 A CN 86103008A CN 86103008 A CN86103008 A CN 86103008A CN 86103008 B CN86103008 B CN 86103008B
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Abstract
The present invention relates to medium carbon air cooling bainitic steel. Manganese and boron are used as main alloy elements. After heat processing, the air cooling hardness of the medium carbon air cooling bainitic steel is more than H<RC>50. A bainite / martensite multiphase structure with good obdurability is obtained through tempering, sigma<0.2> is equal to or more than 120 kg/mm<2>, and sigma<b>is equal to or more than 130 kg/mm<2>. The quenching process step can be omitted, the energy is saved, the cost is reduced, and the steel of the present invention can be used for manufacturing springs, etc. The performance of the present invention reaches or exceeds the performance of 60Si2Mn steel.
Description
The invention belongs to structural lowalloy steel.
Middle carbon bainite/martensite heterogeneous structure has good combination of strength and toughness.Usually carbon bainite/martensite heterogeneous structure all adopts isothermal processes in obtaining on the engineering.The fifties end Irvine and Pichering has proposed Mo-B and W-B is bainitic steel.These steel grades are without isothermal processes, and air cooling can obtain bainite structure.But Mo, the W high price, extensive application is restricted.
The objective of the invention is to develop the steel grade of a kind of middle carbon air-colled bainite/martensite heterogeneous structure.
It is main alloy element that the present invention adopts Mn, B, obtains air-colled bainite/martensite heterogeneous structure, and its composition can be:
1.C0.31～0.46%; Si0.5～1.5%; Mn2.1～3.4%; B0.0005～0.005%; Surplus is Fe(weight %)
2. the better composition of this steel grade can be:
C0.31～0.46%; Si0.5～1.5%; Mn2.6～3.2%; B0.0005～0.005%; Surplus is Fe(weight %)
3. add one or two or more kinds lower column element on the mentioned component basis:
W≤1.5%;Mo≤1%;Cr≤1.5%;V≤0.15%。(weight %)
Steel grade of the present invention can with electric furnace routinely smelting technology smelt, annotate ingot, through being heated to 1200 ℃, the forging rolling rear slow cooling of becoming a useful person.Through hot-work, air cooling and tempering, its performance can reach σ 0.2 〉=120kg/mm
2, σ b 〉=130kg/mm
2
Replace 60Si with steel grade of the present invention
2The Mn steel is made spring etc., can exempt quenching process, saves the energy and reduces cost.This steel grade is used on the engineering obvious economic benefit being arranged.
This steel grade embodiment sees Table:
Claims (3)
1, carbon air-cooled bainitic steels in a kind of is characterized in that with manganese, boron as main alloy element, its composition is:
C0.31～0.46%; Si0.5～1.5%; Mn2.6～3.2%; B0.0005～0.005%; Surplus is Fe.(weight %)
2, by the described steel of claim 1, it is characterized in that adding one or two or more kinds lower column element: W≤1.5%; Mo≤1%; Cr≤1.5%; V≤0.15%.(weight %)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86103008A CN86103008B (en) | 1986-04-30 | 1986-04-30 | Medium carbon air-cooled mn/b bainitic steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86103008A CN86103008B (en) | 1986-04-30 | 1986-04-30 | Medium carbon air-cooled mn/b bainitic steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86103008B true CN86103008B (en) | 1987-06-24 |
| CN86103008A CN86103008A (en) | 1987-06-24 |
Family
ID=4801916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN86103008A Expired CN86103008B (en) | 1986-04-30 | 1986-04-30 | Medium carbon air-cooled mn/b bainitic steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86103008B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101014728B (en) * | 2004-09-27 | 2011-05-25 | 加利福尼亚大学董事会 | Low cost amorphous steel |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4957702A (en) * | 1988-04-30 | 1990-09-18 | Qinghua University | Air-cooling duplex bainite-martensite steels |
| CN1034287C (en) * | 1993-05-29 | 1997-03-19 | 西安工业学院 | Air-cooled bainite steel with high toughness and high quenching performance |
| WO2007118939A1 (en) | 2006-04-19 | 2007-10-25 | Arcelor France | Method of producing a welded part having very high mechanical properties from a rolled and coated sheet |
| KR101736638B1 (en) * | 2015-12-23 | 2017-05-30 | 주식회사 포스코 | Pressure vessel steel plate with excellent hydrogen induced cracking resistance and manufacturing method thereof |
-
1986
- 1986-04-30 CN CN86103008A patent/CN86103008B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101014728B (en) * | 2004-09-27 | 2011-05-25 | 加利福尼亚大学董事会 | Low cost amorphous steel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN86103008A (en) | 1987-06-24 |
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| GR02 | Examined patent application | ||
| PB01 | Publication | ||
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| CX01 | Expiry of patent term |